Big Ideas Math -

Big Ideas Math (BIM) is a K-12 mathematics curriculum authored by Dr. Ron Larson and Dr. Laurie Boswell. It is designed to align with Common Core State Standards and emphasizes a "balanced approach" that combines discovery-based learning with direct instruction.

According to educator and parent reviews from Reddit and EdReports : big ideas math

: Each lesson typically begins with an "activity" designed to help students discover mathematical concepts through exploration before formal instruction. Big Ideas Math (BIM) is a K-12 mathematics